TY  - EJOUR
AU  - Tak, Donggeun
AU  - Pueschel, E.
AU  - Baumgart, M.
AU  - Rodd, N. L.
AU  - Acharyya, A.
AU  - Archer, A.
AU  - Bangale, P.
AU  - Bartkoske, J. T.
AU  - Batista, P.
AU  - Benbow, W.
AU  - Buckley, J. H.
AU  - Falcone, A.
AU  - Feng, Q.
AU  - Finley, J. P.
AU  - Foote, G. M.
AU  - Fortson, L.
AU  - Furniss, A.
AU  - Gallagher, G.
AU  - Hanlon, W. F.
AU  - Hervet, O.
AU  - Hoang, J.
AU  - Holder, J.
AU  - Humensky, T. B.
AU  - Jin, W.
AU  - Kaaret, P.
AU  - Kertzman, M.
AU  - Kherlakian, M.
AU  - Kieda, D.
AU  - Kleiner, T. K.
AU  - Korzoun, N.
AU  - Krennrich, F.
AU  - Lang, M. J.
AU  - Lundy, M.
AU  - Maier, G.
AU  - McGrath, C. E.
AU  - Moriarty, P.
AU  - O'Brien, S.
AU  - Ong, R. A.
AU  - Pfrang, K.
AU  - Pohl, Martin
AU  - Quinn, J.
AU  - Ragan, K.
AU  - Reynolds, P. T.
AU  - Roache, E.
AU  - Ryan, J. L.
AU  - Sadeh, I.
AU  - Saha, L.
AU  - Santander, M.
AU  - Sembroski, G. H.
AU  - Shang, R.
AU  - Splettstoesser, M.
AU  - Tucci, J. V.
AU  - Vassiliev, V. V.
AU  - Williams, D. A.
TI  - Search for Ultraheavy Dark Matter from Observations of Dwarf Spheroidal Galaxies with VERITAS
IS  - arXiv:2302.08784
M1  - PUBDB-2023-00876
M1  - arXiv:2302.08784
PY  - 2023
N1  - 10 pages, 7 figures
AB  - Dark matter is a key piece of the current cosmological scenario, with weakly interacting massive particles (WIMPs) a leading dark matter candidate. WIMPs have not been detected in their conventional parameter space (100 GeV  <~M<sub>χ</sub>  <~ 100 TeV), a mass range accessible with current Imaging Atmospheric Cherenkov Telescopes. As ultraheavy dark matter (UHDM; M<sub>χ</sub>  >~ 100 TeV) has been suggested as an under-explored alternative to the WIMP paradigm, we search for an indirect dark matter annihilation signal in a higher mass range (up to 30 PeV) with the VERITAS gamma-ray observatory. With 216 hours of observations of four dwarf spheroidal galaxies, we perform an unbinned likelihood analysis. We find no evidence of a γ-ray signal from UHDM annihilation above the background fluctuation for any individual dwarf galaxy nor for a joint-fit analysis, and consequently constrain the velocity-weighted annihilation cross section of UHDM for dark matter particle masses between 1 TeV and 30 PeV. We additionally set constraints on the allowed radius of a composite UHDM particle.
KW  - dark matter, annihilation (INSPIRE)
KW  - background, fluctuation (INSPIRE)
KW  - cross section, annihilation (INSPIRE)
KW  - WIMP (INSPIRE)
KW  - galaxy (INSPIRE)
KW  - TeV (INSPIRE)
KW  - VERITAS (INSPIRE)
KW  - observatory (INSPIRE)
KW  - GeV (INSPIRE)
KW  - composite (INSPIRE)
KW  - Cherenkov counter (INSPIRE)
KW  - imaging (INSPIRE)
KW  - gamma ray (INSPIRE)
LB  - PUB:(DE-HGF)25
UR  - https://bib-pubdb1.desy.de/record/576705
ER  -